MAYBE
(ignored inputs)COMMENT doi:10.1007/s10817-011-9238-x [33] p. 499 with small correction: b1/c1 instead of b0/c0
Rewrite Rules:
   [ a1 -> b1,
     a1 -> c1,
     b1 -> b2,
     c1 -> c2,
     a2 -> b2,
     a2 -> c2,
     b2 -> b3,
     c2 -> c3,
     a3 -> b3,
     a3 -> c3,
     b3 -> b4,
     c3 -> c4,
     a4 -> b4,
     a4 -> c4,
     b4 -> b5,
     c4 -> c5,
     a5 -> b5,
     a5 -> c5,
     b5 -> b6,
     c5 -> c6,
     a6 -> b6,
     a6 -> c6,
     b6 -> b7,
     c6 -> b7,
     b7 -> b1,
     b7 -> c1 ]
Apply Direct Methods...
Inner CPs:
   [  ]
Outer CPs:
   [ b1 = c1,
     b2 = c2,
     b3 = c3,
     b4 = c4,
     b5 = c5,
     b6 = c6,
     b1 = c1 ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

Combined result: Can't judge
116.trs: Failure(unknown CR)
(0 msec.)